ASPLENIUM RUTA-MURARIA. 



225 



Trifidum, Moore. — Found at Malgwyn Castle, Pembrokeshire, 

 by Mr. W. Ilutchison. A dwarf form. The basal pinnro on 

 lengthy footstalks, small, and very deeply divided into three 

 cuneate segments, their apices blunt, and indistinctly toothed. 



Spathulatum, Moore. — Found at Town INIalling, in Kent, 

 by Dr. Allchin; Marwood, Devonshire, by the llev. F. Mules; 

 at Settle, Yorkshire, by Mr. A Clapham; at Dunkcld, Perthshire, 

 by the Rev. R. Taylor; and at Fife by ]\Ir. C. Howie. A large 

 vigorous form. The base of the pinnvdcs are narrowed down- 

 wards, and with the blunt apex, being spathulate. 



Fig. 591.— Portion. 



Fig, 592.— Portion. 



Unilaterat.e, Moore. (Fig. 591.) — Found at Mucruss, Kil- 

 larney, by Dr. Allchin; ^t Black Head, County Clare, by Mr. 

 R. Barrington; and at Chaigeley, near Clitheroc, Lancashire, by 

 myself. The pinnse are all on one side of the rachis, the 

 rachis often cxcurrent and hooked at the point; occasionally 

 the pinna becomes an enlarged branch. A very irregular 

 variety. 



Cristatum, Wollaston. (Fig. 592.) — Found near Ruthin 

 Castle, Denbighshire, by Mr. J. Daniels; near Guildford, Surrey, 

 by Dr. Allchin; and near Tunbridge Wells, Kent, by Mr. G. B. 

 Wollaston. Bipinnate, pinnules narrowish, those at the apex 

 of the frond or pinnae dilated at their tips, and somewhat 

 crispy. Other forms are more variable, some tasseled at the 

 apex, some with the apical lobes folded on each other. Often 

 the rachis is divided. 



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